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    Pure Micro Python without Ui-Flow on my M5Stack core2

    Micropython
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    • D
      dhed
      last edited by

      The latest lv_micropython can be built for the 'M5CORE2'-board.
      (I used ESP-IDF v4.0.2 on Ubuntu 20.04)

      Stuff I tested successfully on my M5Core2:

      • display with lvgl widgets
      • touchscreen
      • WLAN
      • RTC
      • SDCard (read)

      Might be interesting for people searching pure Micropython + lvgl on the Core2.

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      • F
        favnec5 @dhed
        last edited by

        @dhed
        hi Dhed, is it possible for you to share the last bin pure lv_micropython firmware for M5CORE ?
        it's been several days i 'm trying to compile it but i'm a win64 user... it's hard for me.

        Thomas

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        • D
          dhed @favnec5
          last edited by

          @favnec5 said in Pure Micro Python without Ui-Flow on my M5Stack core2:

          @dhed
          hi Dhed, is it possible for you to share the last bin pure lv_micropython firmware for M5CORE ?
          it's been several days i 'm trying to compile it but i'm a win64 user... it's hard for me.

          Here's my compiled firmware: zippyshare-link.
          Should be flashable with:

          esptool.py --chip esp32 -p COM3 -b 460800 erase_flash
          esptool.py -p COM3 -b 460800 --before default_reset --after hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 16MB 0x8000 partition-table.bin 0x1000 bootloader.bin 0x10000 micropython.bin
          

          (flashing works even under Windows with the ESP-IDF toolchain installed)

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          • F
            favnec5 @dhed
            last edited by

            @dhed
            Hi, thank you for your firmware.
            I try lot of things. There is a problem to use SDCard with display driver a the same SPI. SDCard is down :-/
            Do you know this problem ?

            Thomas

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            • D
              dhed @favnec5
              last edited by

              @favnec5
              My workaround for this (known) problem:

              1. during boot mount the sdcard and load files to ram
              2. then unmout the sdcard
              3. initialize the display

              something like:

              import uos
              from machine import Pin, SDCard
              
              sdcard = SDCard(slot=2, sck=Pin(18), miso=Pin(38), mosi=Pin(23),  cs=Pin(4), freq=40000000)
              uos.mount(sdcard, '/sd')
              ...
              uos.umount('/sd')
              sdcard.deinit()
              

              before initializing the display:

              from ili9XXX import ili9341
              lcd = ili9341(spihost=1, mosi=23, miso=38, clk=18, dc=15, cs=5, invert=True, rot=0xC0, width=320, height=240, rst=-1, power=-1, backlight=-1)
              

              I'm loading weathericons to use with openweathermap that way.

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              • F
                favnec5
                last edited by

                Hi, the problem is, for me, that i need to write files to the sdCard like a datalogger. I think old lobo’s version do the job but not lv_micropython… @m5stack : official pure m5stack needed to use the core 2 functionalities OR hidden start menu version of uiflow.

                Thomas

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                • J
                  Josef @favnec5
                  last edited by

                  @favnec5 Here is another Micropython port for the Core2. Already thried that with my core2: https://github.com/thuehlinger/micropython-core2

                  Another note: you do not need to use another firmware, you can use Micropython directly by just not using uiflow. See my repo https://github.com/hjgode/m5home within the lv dir: lv_test.py
                  Be warned, the LV Binding is not very well documented and often only links to the C API.

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                  • P
                    purpledread @dhed
                    last edited by

                    @dhed

                    I tried to get your compiled firmware, but that ZippyShare site keeps trying to download other things and I can't get it to download your file.

                    Thanks,
                    /Chris

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                    • D
                      dhed @purpledread
                      last edited by

                      @purpledread That link still works for me, but here it is uploaded to an alternative.

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                      • P
                        purpledread
                        last edited by

                        Thanks, the new upload link worked.

                        /Chris

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                        • P
                          purpledread
                          last edited by

                          @dhed

                          That's all working now, including using ampy to copy files and run code.

                          I'm use to using Mu Editor with my other ESP32 boards.

                          Is there some way to run Python code and get back error messages if there is an issue in the code?

                          Thanks!
                          /Chris

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                          • D
                            dhed @purpledread
                            last edited by

                            @purpledread
                            I'm using VSCode with the PyMakr extension (see LeMaRiva's blog for install-instructions).
                            Nice IDE with integrated serial-console for REPL and up-/downloading of files.

                            But I guess any serial-console (i.E. PuTTY) should allow you to see error messages.
                            Also check micropython.org for instructions to get a REPL over the serial port.

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                              purpledread @dhed
                              last edited by

                              @dhed

                              Actually, ampy is working fairly well.

                              Thanks,
                              /Chris

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                              • P
                                purpledread @dhed
                                last edited by

                                @dhed

                                I'm trying to read from the SD card on startup and then use the display.

                                If I access the sd card, the program runs with no errors, but nothing displays.

                                I tried initializing the display using the example you gave, but I get an error that there isn't enough DMA-able memory to allocate the display buffer.

                                /Chris

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                                • P
                                  purpledread @purpledread
                                  last edited by

                                  @dhed

                                  Sorry for the newbe questions. You've been a big help.

                                  When you say you load files to ram from the boot.py file, how do you access that ram from the main.py file?

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                                  • P
                                    purpledread @purpledread
                                    last edited by

                                    @purpledread

                                    Never mind. As simple Python code.

                                    Thanks!

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                                    • S
                                      Snufkin1514
                                      last edited by

                                      Is it possible to use m5stack_ui here?
                                      How do it?

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